Type-writing machine.



PATENTED APR. 4, 1905.

C. H. SHEPARD. TYPE WRITING MACHINE.

\MTNEEEES.

ATTORNEY UNITED STATES Patented April 4, 1905.

PATENT OFFIC CHARLES H. SHEPARD, OF BROOKLYN, NEW YORK, ASSIGNOR TOl/VYOKOFF, SEAMANS & BENEDICT, ()F ILlON, NEWV YORK, A COR- PORATION OFNE YORK.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 786,464, dated April 4,1905.

Application filed April 5, 1902- Serial No. 101,446.

To all whom, it WMLZ/ cancer/1.:

Be it known that 1, CHARLES H. SHEPARD, a citizen of the United States,and arosidentof the borough of Brooklyn, city of New York, in the countyof Kings and State of New York, have invented certain new and usefulImprovements in Type-WVriting Machines, of which the following is aspecification.

My invention relates to the two-part connecting links or rods oftype-writing machines wherein the separate parts are united byscrew-thread connections. It has been found impracticable to make thethreaded connections between the members of each link of sufficientlysnug a lit to prevent an accidental displacement of one member withrelation to the other during the operation of the machine, and in orderto overcome this defect it has been customary to employ a jamnut on eachlink to hold the parts together; but considerable difficulty has beenfound in the use of these jam-nuts by reason of the fact that they donot efficiently provide against an accidental displacement of the parts,because it is impracticable tornake the nuts fit their associatedthreads sufficiently snug, and in a short time the parts will work outof proper adjustment. Then, again, it frequently occurs that thetightening of the jamnuts will start a fracture in the threads of thelinks, with the result that the threads will soon break when the machineis put into use, and, no matter how careful an inspection may be made,this imperfection will not be disclosed until the machine is in use onthe market.

The object of my present invention is to overcome the difiicultieshereinbefore' referred to and to provide a simple, inexpensive, andefficient means for uniting the threaded members of each link andwherein there is little or no liability of the parts becoming displaced,deranged, or broken; and to these ends my invention consists in theconstruction, arrangement, and combinations of parts hereinafterdescribed and claimed.

In the accompanying drawings, Figure 1 is a side view of suflicientnumber of parts of a type-writing machine to illustrate my invention.Fig. 2 is an enlarged detail side view, partly in section, of one formof the connecting means between the members of a link embodying myinvention. Fig. 3 is a detail fragmentary side view of a portion of thelink connection, the view illustrating a different disposition of theparts to secure them in the adjusted position.

I have illustrated my invention in its application to a No. 6 Remingtontype-writing machine, wherein the key-levers 1 are pro vided withfinger-keys 2 and are fulcrumed at 3 in the frame 4 of the machine, eachkeylever having an associated restoring-spring 5. Each key-lever l isprovided with a surrounding U-shaped strap 6, to which is pivoted at 7one member, 8,0fa two-part connecting-link, the'other member, 9, of thelink carrying the usual Remington coupler, by which the link ispivotally connected at 10 to the typebar 11, which latter is pivoted at12 to a hanger 13, secured by a screw 14 to the top plate 15 of themachine. Each type-bar 11 cooperates with a platen, which isdiagrammatically illustrated at 11. The member 9 of the connecting-linkis in the nature of a rod, which at its lower end is externallyscrew-threaded, as at 16, to take into internal screw-threads 17 and 18in a divided socket formed by the parts 19 and 20, respectively, andwhich extend at substantially right angles to the body portion or shankof the member 8. The parts 19 and 20 are formed and threaded in thefollowing manner: Those portions of the member 8 which constitute theparts 19 and 20 are preferably made of spring or resilient metal and arefirst made in one piece and drilled through where the internalscrewthreads are to be formed. The piece or socket is then divided at 21to form the separated parts 19 and 20, and the hole extending throughthe two parts is threaded by a single tapping operation, which alsoclears away any bur that may have been formed in the hole by thesplitting process. The two parts 19 and 20 are now forced away from eachother, as represented in Fig. 2, or toward each other, as shown in Fig.3, so that the parts are at an angle to each other to change therelative positions of the threads or to effect a lateral displacement ofthe threads 17 relative to the threads 18, and when the threaded portion16 of the member 9 is screwed into the parts 19 and 20 a spring tensionis produced on the parts 19 and 20 as soon as the threaded end of themember 9 enters part 19 after passing through part 20, and the frictionon the engaging threads is produced by the tendency of the parts 20 and19 to move to their original positions, thus maintaining thetwo members8 and 9 of the link securely united, though permitting a relativeadjustment and disconnection when desired. It will be understood thatthe spring tension of the parts 19 and 20 is uniform under all relativeadjustments of the members 8 and 9.

\Vhile the preferred manner of constructing one form of link embodyingmy invention is that shown in Fig. 3, itis obvious that various changesin the construction and operation of the device may be made withoutdeparting from the spirit of my invention. Thus, for instance, insteadof the member 8 or the parts 19 and 20 thereof being made of s 'n'ingmetal it'or they may be made of non-resilient metal and the parts benttoward or away from each other, as indicated in the drawings, so thatthreads 17 and 18 will bind against the threads 16. In either case itwill be seen that there is produced a relative displacement of thethreads 17 and 18, which results in an effective engagement between thethreads on the two members 8 and 9 of the link.

\Vhat I claim as new, and desire to secure by Letters Patent, is-

1. In a typewriting machine, a connectinglink comprising a rod having anexternallyscrew-threaded portion, and an internallyscrew-threadedsocket, which is split through the threaded portion thereof.

2. In a type-writing machine, a connectinglink comprising a rod havingan externallyscrew-threaded portion, and an internallyserewthreadedsocket, one portion of the threads of which is displaced with relationto another portion of said threads:

3. In a type-writing machine, a connectinglink comprising one memberhaving an externally screw threaded portion and another member havingtwo internally-screw-threaded parts for the reception of the threadedportion of the other member, the. internal thread of one of said partsbeing displaced with relation to the internal thread of the other part.

4. In a type-writing machine, a connectinglink comprising one memberhaving an externally-screw-threaded portion and another member havingtwo internally-serew-threaded resilient parts for the reception of thethreaded portion of the other member, the internal thread of one of saidresilient parts being displaced with relation to the internal thread ofthe other part.

5. Ina type-writing machine, a connectinglink comprising one memberhavingan externally-threaded portion and another member having an endportion which is bent at an angle to the body thereof, the bent endbeing divided into two parts that are at an angle to each other andprovided with transverse screwthreaded openings extending therethroughfor the reception of the eXternally-tln'eaded portion of the othermember.

6. In a type-writing machine, the combination with a type-bar and akey-lever, of a connecting-rod comprising a member 8 having two integralthreaded nuts arranged at an angle to each other, and a member 9 havingan eXteriorly-threaded portion to engage said nuts.

Signed in the borough of Manhattan, city of New York, in the county ofNew York and State of New York, this Ath day of April, A. D.

CHARLES H. SHEPARD.

WVitnesses:

K. V. DONOVAN, E. M. TELLS.

